Two-dimensional metallic photonic crystal-based colored filter

Abstract

The invention discloses a two-dimensional metallic photonic crystal-based colored filter, which belongs to the technical field of liquid crystal display. The two-dimensional metallic photonic crystal-based colored filter comprises a substrate and a plurality of two-dimensional transmission type metallic photonic units, wherein the two-dimensional transmission type metallic photonic units are positioned on the substrate; the two-dimensional transmission type metallic photonic units correspond to each pixel of a liquid crystal display; and each two-dimensional transmission type metallic photonic unit comprises an isolation matrix and three two-dimensional transmission type metallic photonic crystals having different cycles, wherein the two-dimensional metallic photonic crystals are positioned in the isolation matrix to filter the spectrums of red, green and blue correspondingly. The two-dimensional metallic photonic crystal-based colored filter can make light with specific wavelengths emit out at the same time, and make emergent light in linear polarization to improve light brightness; when the two-dimensional metallic photonic crystal-based colored filter is placed on a liquid crystal layer, the brightness can be increased by two times maximumly; when the two-dimensional metallic photonic crystal-based colored filter is placed on the light guide plate, the brightness can be increased by 5 times maximumly; and simultaneously, the integration level of a panel device can be improved, and the thickness and the cost of a panel can be reduced greatly.

Description

technical field [0001] The invention relates to a device in the field of liquid crystal display technology, in particular to a color filter with polarizer function based on a two-dimensional metal photonic crystal. Background technique [0002] The principle of thin film transistor-liquid crystal display (TFT-LCD) is to use liquid crystal to form polarized light to control whether the light passes or not. The structure of the main part of the traditional TFT-LCD panel includes several major components such as liquid crystal interlayer and backlight module. The liquid crystal interlayer includes two front and rear orthogonal polarizers, a glass plate, a grooved surface, a liquid crystal layer, a color filter, etc. The principle is to control the polarization state of the light emitted from the front polarizer by applying a voltage to the liquid crystal layer , so as to control the amount of light output from the rear polarizer to achieve the display function. The function o...

AI Technical Summary

Problems solved by technology

There are some obvious deficiencies in traditional TFT-LCD panels: first, the traditional absorbing polarizer that produces linear polarization will cause nearly 1 / 2 of the light absorption loss; second, in order to increase the light uniformity of the backlight module, an optical diffusion film and Various devices such as prism anti-reflection coating increase the thickness and cost of the panel

However, this structure cannot reduce the loss caused by the p-polarizer, and because it uses a one-dimensional grating, it has no diffraction ability in the direction perpendicular to the grating, so the light uniformity will be affected

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